Help: heads

Find changesets by keywords (author, files, the commit message), revision
number or hash, or revset expression.

hg heads [-ct] [-r STARTREV] [REV]...

show branch heads

With no arguments, show all open branch heads in the repository.
Branch heads are changesets that have no descendants on the
same branch. They are where development generally takes place and
are the usual targets for update and merge operations.

If one or more REVs are given, only open branch heads on the
branches associated with the specified changesets are shown. This
means that you can use "hg heads ." to see the heads on the
currently checked-out branch.